#include<iostream.h>
class base{
    int a;
public:
    base(int sa)
    {
        a=sa;
        cout<<"constructing base"<<endl;
    }
};
class base1:virtual public base{
    int b;
public:
    base1(int sa,int sb):base(sa)
    {
        b=sb;
        cout<<"Constructing base1"<<endl;
    }
};
class base2:virtual public base{
    int c;
public:
    base2(int sa,int sc):base(sa)
    {
        c=sc;
        cout<<"Constructing base2"<<endl;
    }
};

class derived:public base1,public base2
{
     int d;
public:
    derived(int sa,int sb,int sc,int sd):base(sa),base1(sb),base2(sc)
    {
        d=sd;
    }
};
 int main()
{
    derived obj(2,4,6,8);

    return 0;
}
运行错误
--------------------Configuration: E4_12 - Win32 Debug--------------------
Compiling...
E4_12.CPP
E:\vc\E4_12\E4_12.CPP(43) : error C2664: '__thiscall base1::base1(const class base1 &)' : cannot convert parameter 1 from 'int' to 'const class base1 &'
        Reason: cannot convert from 'int' to 'const class base1'
        No constructor could take the source type, or constructor overload resolution was ambiguous
E:\vc\E4_12\E4_12.CPP(43) : error C2664: '__thiscall base2::base2(const class base2 &)' : cannot convert parameter 1 from 'int' to 'const class base2 &'
        Reason: cannot convert from 'int' to 'const class base2'
        No constructor could take the source type, or constructor overload resolution was ambiguous
执行 cl.exe 时出错.

E4_12.OBJ - 1 error(s), 0 warning(s)


可是我怎么都找不到在哪里？
请指教，谢谢啦！

#include<iostream.h>
class base{
    int a;
public:
    base(int sa)
    {
        a=sa;
        cout<<"constructing base"<<endl;
    }
};
class base1:virtual public base
{
    int b;
public:
    base1(int sa,int sb):base(sa)
    {
        b=sb;
        cout<<"Constructing base1"<<endl;
    }
};
class base2:virtual public base
{
    int c;
public:
    base2(int sa,int sc):base(sa)
    {
        c=sc;
        cout<<"Constructing base2"<<endl;
    }
};

class derived:public base1,public base2
{
     int d;
public:
    derived(int sa,int sb,int sc,int sd):base(sa),base1(sa,sb),base2(sa,sc)
    {
        d=sd;
    }
};
int main()
{
    derived obj(2,4,6,8);

    return 0;
}
你的构造函数的参数个数不匹配啊

十分感谢！好了！

楼主我还以为是新帖子呢......刚想来动手啊,我是纯粹爱好,不是学计算机的

我也不是学计算机的，
我是光电的，也是爱好，我从12岁开始学c语言，到了26岁了还没有把编程学好，

C++麻烦多了......

呵呵.12岁???你真强啊..............

惭愧啊！